oldskool67
NAXJA Forum User
- Location
- CA
A couple of months ago I replaced both the front and rear vacuum harness on my 89 XJ. I also replaced the CCV line. Well, I accidently drove the jeep around the block with the end of the CCV line not attached to the intake ( where it sucks in air ) the vehicle was bogging and made a sound like loud humming. Of course I returned home and correctly attached the line. The bogging and noise stopped with it attached. When I drive it at freeway speeds, especially in OD it boggs unless I drop it down a gear and accelerate. It stills makes the noise on the freeway when under load. Sounds like back pressure. It causes heat build up if climbing a grade for a significant distance. I still need to see if my CAT is partially blocked (that's what it feels like) however it will rev and run in the lower gears. Could the CAT still be partially blocked ? What damage could I have done by driving it a short distance with the vacuum line open ? It didn't make this noise or perform like this before. Thanks for any suggestions. Sorry for the lack of knowledge on my part. I'm still learing